TM090 12-26 Series II CFGWH Service Instructions
REV AB
– Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies
are deemed “uncontrolled”
45
Fault Finding Chart 3.6
YES
NO
Water flow servo
malfunction
3.6
Replace water body assembly.
3.7
Temp set below
46 degrees.
Temp set above
46 degrees.
YES
NO
Replace PCB assembly.
NO
YES
Note: the bypass solenoid is activated only
if the set temperature is below 46 degrees.
Test 15
Replace water body assembly.
YES
YES
Isolate and then
restore power.
NO
Test 15 B
After power is restored the water
flow servo motor limiter should
move to the fully open position
NO
Set the hot water
temperature at 60º and
fully open a hot water tap.
YES
NO
*5Y is the temperature of the hot
water outlet thermistor
YES
NO
YES
Replace PCB assembly.
YES
Test 16
Replace the proportional gas
flow regulating valve.
NO
Is error code
65 displayed?
Is the bypass solenoid
open circuit?
YES
Test 15
Is the PCB supplying
power to the solenoid?
Is diagnostic test 15
normal?
NO
YES
Test 15
Is the water
flow servo motor at
ON position?
Is the water
flow servo motor
functional?
Water servo motor is OK
YES
*Is maintenance
information 5y
displaying 60?
Is error code
52 displayed?
Is the resistance of
the proportional gas
flow regulating valve
normal?